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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






2. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING






3. (male) pushes the testes outward toward the legs for a cool-down off of the body






4. 30 hours after estrus begins






5. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation






6. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






7. Microscopic - make sure not sterile - very few bulls are actually tested






8. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






9. 14-19 (17) days






10. Way to know everything is alright with the breeding male






11. Milk ~305 days - dry 60 days prior to calving






12. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






13. Scar tissue plugs up chambers of udder






14. Days which have increasing daylight hours


15. (LH) stimulates the Leydig cells to produce testosterone






16. Actual heat cycle (period)






17. 265-285 days






18. FEED






19. Animal which has been castrated after puberty






20. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






21. To remove/separate testicles from animal's body before animal reaches puberty






22. Contains and regulates the temp of the testes for sperm production






23. 336 days






24. 4-6 days






25. % of fat in milk. makes cheeses and ice cream. regulates cost of milk






26. 147 days






27. 24 hours before end of estrus cycle






28. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






29. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






30. 19-23 (21) days






31. Prevent the cow from getting an infection from the calve






32. FEED






33. (FSH) causes egg to mature in females






34. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market






35. 45-60 days after breeding; re-breed as required






36. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






37. When are dairy cattle dehorned?






38. (male) pushes the testes upward toward the body for warmth or protection






39. Implies the amount of estrogen production






40. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.


41. Way to know everything is alright with the breeding male






42. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






43. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






44. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






45. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






46. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






47. Prevent the cow from getting an infection from the calve






48. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






49. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.






50. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.